by Ramón Rubio Silvestre, Enrique Rubio Polo · Rubio · tapa blanda · ISBN 9788489773233
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«Problemes Rubio 18» is the problem workbook by Ramón Rubio Silvestre and Enrique Rubio Polo, published by Rubio in paperback (20 pages, in Catalan).
Activity workbook presenting problems of addition, subtraction, multiplication and division with multi-digit numbers, with progressive exercises to practise logical-mathematical reasoning. Designed as primary school reinforcement material, it is part of the Operacions i Problemes RUBIO series in Catalan.
Workbook number 18 of the series «Operacions i Problemes RUBIO (català)», within the collection «l'Art d'apprendre». Published by Rubio in 2010.
For students aged 11 to 12, in Year 6 of primary school, as mathematics reinforcement material.
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